Ten of the nation’s top climate scientists penned a letter to Secretary of State Hillary Clinton today questioning why the State Department isn't considering the enormous climate change impacts of developing the Alberta tar sands in its review of the controversial Keystone XL export pipeline project.

Think that that dirtiest oil on the planet is only found up in Alberta? You might be surprised then to hear that there are tar sands deposits in Colorado, Utah and Wyoming, much of which are on public lands.